Distribution of Ni-56 yields of type ia supernovae and its implication for progenitors

doi:10.1088/1009-9271/8/1/07

YNAO OpenIR > 大样本恒星演化研究组

	Distribution of Ni-56 yields of type ia supernovae and its implication for progenitors
	Wang B(王博)1,2 ; Meng XC(孟祥存)1,2 ; Wang, XF 3,4; Han ZW(韩占文)1 ; Wang, B (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2008
卷号	8 期号:1 页码:71-80
DOI	10.1088/1009-9271/8/1/07
产权排序	第1完成单位
收录类别	SCI
关键词	Stars : Evolution Supemovae : General White Dwarfs
摘要	The amount of Ni-56 produced in Type Ia supernova (SN Ia) explosion is probably the most important physical parameter underlying the observed correlation of SN Ia luminosities with their light curves. Based on an empirical relation between the Ni-56 mass and the light curve parameter Delta m(15), we obtained rough estimates of the Ni-56 mass for a large sample of nearby SNe Ia with the aim of exploring the diversity in SN Ia. We found that the derived Ni-56 masses for different SNe Ia could vary by a factor of ten (e.g., M-Ni = 0.1 - 1.3 M(D), which cannot be explained in terms of the standard Chandrasekhar-mass model (with a 56Ni mass production of 0.4 - 0.8 M-circle dot). Different explosion and/or progenitor models are clearly required for various SNe Ia, in particular, for those extremely nickel-poor and nickel-rich producers. The nickel-rich (with M-Ni > 0.8 M-circle dot) SNe Ia are very luminous and may have massive progenitors exceeding the Chandrasekhar-mass limit since extra progenitor fuel is required to produce more Ni-56 to power the light curve. This is also consistent with the finding that the intrinsically bright SNe Ia prefer to occur in stellar environments of young and massive stars. For example, 75% SNe Ia in spirals have Delta m(15) < 1.2 while this ratio is only 18% in E/S0 galaxies. The nickel-poor SNe Ia (with M-Ni < 0.2 M-circle dot) may invoke the sub-Chandrasekhar model, as most of them were found in early-type E/SO galaxies dominated by the older and low-mass stellar populations. This indicates that SNe Ia in spiral and E/SO galaxies have progenitors of different properties.
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	1009-9271
URL	查看原文
归档日期	2008-03-04
WOS记录号	WOS:000253671300007
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	HUBBLE CONSTANT ; EXPLOSION MODELS ; LIGHT CURVES ; WHITE-DWARFS ; PEAK LUMINOSITY ; STAR-FORMATION ; HOST GALAXIES ; DECLINE RATE ; MASS ; EVOLUTION
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/4462
专题	大样本恒星演化研究组
通讯作者	Wang, B (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
作者单位	1.National Astronomical Observatories / Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011 2.Graduate School of Chinese Academy of Sciences, Beijing 100049 3.Tsinghua Center for Astrophysics (THCA) and Department of Physics, Tsinghua University, Beijing 100084 4.Astronomy Department, University of California at Berkeley, CA 94720, USA
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Wang B,Meng XC,Wang, XF,et al. Distribution of Ni-56 yields of type ia supernovae and its implication for progenitors[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2008,8(1):71-80.
APA	Wang B,Meng XC,Wang, XF,Han ZW,&Wang, B .(2008).Distribution of Ni-56 yields of type ia supernovae and its implication for progenitors.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,8(1),71-80.
MLA	Wang B,et al."Distribution of Ni-56 yields of type ia supernovae and its implication for progenitors".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 8.1(2008):71-80.

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